1245572120 has 64 divisors (see below), whose sum is σ = 3034160640. Its totient is φ = 457459200.

The previous prime is 1245572117. The next prime is 1245572123. The reversal of 1245572120 is 212755421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1245572117) and next prime (1245572123).

It is a super-2 number, since 2×1245572120² = 3102899812242588800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245572123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93050 + ... + 105590.

It is an arithmetic number, because the mean of its divisors is an integer number (47408760).

Almost surely, 2^1245572120 is an apocalyptic number.

1245572120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245572120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517080320).

1245572120 is an abundant number, since it is smaller than the sum of its proper divisors (1788588520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245572120 is a wasteful number, since it uses less digits than its factorization.

1245572120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12756 (or 12752 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 1245572120 is about 35292.6638269202. The cubic root of 1245572120 is about 1075.9438964128.

The spelling of 1245572120 in words is "one billion, two hundred forty-five million, five hundred seventy-two thousand, one hundred twenty".